These ski poles from the Fischer adventure line is a good choice when off track skiing is your thing.
BCX Variolite ski poles are great companions for backcountry cross-country skiing - they are length adjustable (95cm - 160cm) so variations in terrain and changing snow conditions will not be a trouble for you - just adjust the poles for a satisfying operation length. The easy-to-use Air Lock 2.0 will ensure quick adjustment of the pole length.
They are both lightweight and durable due to the construction in aluminium with a weight of 285grams pr. pole.